On Thursday, officers picked up Clark heating into a station at 15th and JFK Boulevard. He was wearing the same jacket and carrying the woman's cell phone.

On Friday police tried to make riders feel more comfortable on the train.

"We have a lot of plain-clothes officers but we put them in uniform so they can be more visible during this recovery time for our riders. It really is safe place to get to and from the city," said Chief Nestel.

Meanwhile Clark denies that he had anything to do with the attack. His bail was set at $2 million and he is due back in court on February 5th.